I am having a problem with my 9930. On about half of the incoming calls there is no sound when I answer. The caller can't hear me and I can't hear them. The call shows connected but there is no sound.
I am running OS ver 7.0.0.374
The installed apps are:
Battery Watch
berryweather
Mobile Checkbook
Show me the Images
SplashID
Taskmaster.

I have removed everything from the device and then Re-installed the OS and apps and reactivated the phone on our BES.